Quote:
Originally Posted by Mark Yacavone
I have seen this right on the dyno too. Another "it depends".
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Mark is correct. It depends on the engine, especially on the type of engine, horsepower output and RPM. A higher horsepower/high RPM engine will benefit from aftermarket rocker arms due to reduced rocker arm deflection and stabilization of the valvetrain. Since the liberalization of camshaft specifications with more radical lobes and high pressure valve springs, a stamped rocker arm will have a very limited life.